|
Forum: Pentax DSLR Discussion
05-24-2017, 09:58 AM
|
| |
fox, if you would have read would i have written, you would have to ask yourself where the point in your "answer" is.
to me it seems that if a lens is already slow as a snail and the af.c math on the camera side isnt very good its a catastrophe.
If the lens is going to focus very fast its less than half the pain and af.c math can keep the lens in touch with the subject so'n'so.
(But actually pretty good for a Pentax)
I absolutely agree that it(AF.C) still gets pretty messy, especially in Live-View(which is adding a whole other deficit of pentax cameras - no pdaf on sensor...)...
thats why i wrote that 10% of the problems are on the camera side for sure... let it be 30% if you think so(i will not disagree)
But you have to admit that the PLM is a VAST improvement...
Its like it is focussing and hits the focused point at the very moment you place your finger on the shutter button.
(Given the fact you chose AF.S)
That is progress we are allowed to be happy about isnt it?
Just take a look!
You Tube
|
src="https://www.youtube.com/embed/2YSyrh3ldgM?controls=1" allowfullscreen>
|
or watch:
You Tube
|
src="https://www.youtube.com/embed/NpQ8Em4uafg?controls=1" allowfullscreen>
|
So there would be a benefit for sure, if PENTAX(Ricoh-Imaging) would start to take that PLM technology a bit further and implement it as Double-PLM in full frame lenses(since the elements in bigger glass are heavier)
And given the fact that Canon charges nearly the same(or less!) for its "Canon EF 70-200 mm 1:2,8 L IS II USM"
as Pentax charges for its "Pentax D FA 70-200mm HD F2.8 ED DC AW",
--> it will be pretty difficult for PENTAX to rectify or explain a price hike(when implementing PLM), given the fact that Canon not also has lightning fast AF drive implemented since years, it also has to build Stabilizers into its lenses...AND! believe it or not this lens(Canons) is also weathersealed like a tank. (So I feel pretty lucky when I spare myself the usual "But it may make things more expensive"-angst.)
And you also can't deny that a lens that is not capable of keeping up with the AF sensing...
(which is in itself lightning fast like on every other camera IF no higher math gets involved - you see that at )
... will defenitely make good AF.C behaviour far more difficult, since when a subject is moving fast thru your frame, the lens has to be capable of refocusing(driving) to the point sensed by PDAF, and it should do that faster then the moving subject.
|
|
Forum: Pentax DSLR Discussion
05-23-2017, 12:33 PM
|
| |
I know the thread is going into the AF.C direction, but i wanted to note that:
Since i have seen the performance of the HD PENTAX-DA 55-300mmF4.5-6.3ED PLM WR RE, I know there is a future for PENTAX cameras...
AF-Problems(speed issues) really seem to be a lens problem most of the time (90% lens, 10% body) but i feel there are also some rudimentary bytes of code on the camera AF side that do some trial and error math (and in result of this af-moving) "a bit" too often.
But the lens alone (50-300 PLM)performs so good that it can cover the problems on the camera side...
They should really use 2 of those Pulse-Motors for the FF lenses if one is too weak.
Double-PLM rules! |
|
Forum: Pentax DSLR Discussion
05-21-2017, 08:44 AM
|
| |
| |
|
Forum: Pentax DSLR Discussion
05-21-2017, 01:21 AM
|
| |
Actually i dont know what you are talking about.
I just posted my oppinion about what Ricoh-Imaging could/should improve in the next DSLR bodies. (if you want to say, "no RICOH, stop improving AF!" so just say it)
And maybe I will buy an A9 with a 24-240, 100-400 and a G Master 85mm... Maybe i will not... Why do you care and are you sure this belongs here?
|
|
Forum: Pentax DSLR Discussion
05-18-2017, 07:40 AM
|
| |
Sry, pals. No comment on any "fire-archery..."
I cant help wondering how posting photos that I shot, will enhance the AF-system in upcoming Pentax K-mount cameras.
Especially given the fact that, I am a longtime Pentaxian and I know my ways around its(the af-sys) drawbacks.
Talking about "ways around":
Just because WE know our ways around the shortcomings of PENTAX AF, it is still obvious that ricoh-imaging still has improvements to do on it.
Just to tap the right points, so the thread doesnt loose its direction and we get closer to Point Godwin again and to keep things more factual than sophistic-->
You can think about some keywords(and discuss them to death if you want to):
AF.C - low hitrate compared to almost every other camera system
LView-AF - missing PDAF(only CDAF)
"Trial and Error" autofocus algorithm in Pentax cameras - (you can read something about that behaviour in some article on pentaxforums.com)
And before things get too emotional, I suggest you listen very closely to a video that many internet users can watch on youtube.
Just search for "Pentax K-1 Hands-On Field Test (with Nick Devlin)" on youtube.
or click the following link if it works->
Youtu.be
|
src="https://www.youtube.com/embed/87yGmD71nyA?controls=1" allowfullscreen>
|
Please DO NOT WAIT for any AF.C fast paced sports shooting test in this video. They kept that out for a very special reason.
Just read and/or listen to the first 20 seconds of the video.
And think if you want to read that more often on the internet and why you would want that for you and every other pentaxian. THX.
And it is not the shortcomings of the system; No, its just that these aggressive posts/attempts on turning facts around and subliminally vilifying everyone who dares to speak critically about the PENTAX system, that drags the image of every PENTAX user through the dirt. -just keep in mind there is a universe, way bigger than pentaxforums.-
They even warn viewers not to mention anything negative they learned from these videos...
Maybe because they are already worried that one day some hardcore-pentaxian will draw a knife and ask an IT-friend where "this guy with this email adress lives" because he may stole his purse. ;) Get it ? No good. NO GOOD.
|
|
Forum: Pentax DSLR Discussion
05-18-2017, 04:03 AM
|
| |
... i just wanted to mention, that you can not allege everybody who didnt buy a Nikon D500 to be a skinflint or a person that thinks the gear is not worth the money
Some people have big lens-parks and stood/stand by the PENTAX brand, because they are/were satisfied with their older gear that was OK at the time they bought it and a few years after and they thought there will be real progress when a new flagship will be offered.
BUT:
Now a few years passed by and one would think there should have been significant progress in getting better AF on new cameras;
What sadly is only a bit true, because if you are dependend on a very good output and "hitrate" as a photographer and you still use the PENTAX system because your lenspark is THAT huge, you will still be better off if you only rely on the mid-focus method.
Just like more than a decade ago.
I like the brand for its ruggedness, and the K-5IIS was a real nice and clean body design with an impressive IQ and overall specs..
burst-framerate was pretty darn good at that time.
but looking at the K-1 and its Autofocus, I ask myself where the progress is that one would expect from such a "big step".
I count on some legitamate photography fellows to support me here and admit that those tacky wheels and LEDs dont mean a progress for photography as such in any way. thx.
|
